| 摘要 |
A structure for diagnosing deflection of a girder for a bridge is provided to measure the deflection amount of the girder easily and simply and thus to prevent safety accidents caused on the bridge. A structure for diagnosing deflection of a girder for a bridge(200) comprises a girder coupling unit(210), a coupling band(220), a guide pipe(230), a sensor box(240), and an emergency indication unit(250). The plural girder coupling units, each of which is composed of a T-shape vertical plate(211) with a penetration hole(212) and a square plate(213) with a coupling hole(214), are coupled to a lower surface of the girder by coupling bolts(215). The pair of coupling bands is coupled to an upper part of the bridge by coupling bolts(225), and includes a band body having a coupling hole(222) formed at both longitudinal flanges and a sliding prevention pad(223) attached to the inside of the band body. The guide pipe has rounding units(231) formed at both longitudinal sides to be welded at one side of the coupling band. The plural sensor box are installed inside the guide pipe and coupled to horizontal coupling holes(232) of the guide pipe by coupling bolts(235). The sensor box includes a sensor connecting unit(242), sending and receiving sensors(S1,S2), a connecting unit(243), and a guider(244). The emergency indication unit is installed at the upper surface of the guide pipe and positioned closely to the position of the sensor box. The emergency indication unit includes a circular pipe(253) and a lamp(254). The lamp is alarmed when the girder coupling unit is lowered.
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